Photophysical parameters of the studied corrole in all solvents.
| Solventa | λ, nm (ε; M−1 cm−1)b | λ em, nm (Φf, %)c,d | SS e(nm cm−1−1) | τ f f(ns) | χ 2 | k r (×106 s−1)g | τ r h(ns) | k nr (×106 s−1)g |
|---|---|---|---|---|---|---|---|---|
| Toluene | 300 (26 732), 419 (59 182), 566 (8151), 617 (5939) | 653 (3.0) | 36/893 | 4.71 ± 0.05 | 1.02591 | 6.37 | 1.57 | 205.9 |
| THF | 367 (39 098), 421 (52 165), 588 (7237), 631 (10 100) | 646 (2.3) | 15/368 | 4.32 ± 0.04 | 1.14370 | 5.32 | 1.88 | 226.1 |
| DCM | 299 (37 313), 412 (70 099), 566 (10 820), 611 (8681) | 671 (2.0) | 60/1463 | 4.19 ± 0.04 | 1.07256 | 4.77 | 2.10 | 233.8 |
| EtOH | 296 (40 248), 409 (65 373), 567 (10 945), 612 (7985) | 674 (4.1) | 62/1503 | 4.05 ± 0.05 | 1.06452 | 10.12 | 0.99 | 236.8 |
| ACN | 295 (41 829), 419 (71 884), 582 (7998), 623 (14 465) | 645 (3.7) | 22/547 | 4.40 ± 0.05 | 1.12275 | 8.41 | 1.19 | 218.8 |
| DMF | 297 (58 504), 425 (89 998), 586 (14 659), 628 (20 582) | 649 (4.4) | 21/515 | 4.20 ± 0.04 | 1.17435 | 10.48 | 0.95 | 227.6 |
| DMSO | 298 (55 812), 425 (74 389), 587 (12 335), 628 (18 235) | 650 (7.0) | 22/539 | 4.51 ± 0.05 | 1.02708 | 15.52 | 0.64 | 206.2 |
a
Dieletric constant (ε0 = 2.38 for toluene; ε0 = 7.52 for THF; ε0 = 8.93 for DCM; ε0 = 24.6 for EtOH; ε0 = 36.64 for ACN; ε0 = 38.25 for DMF and ε0 = 47.0 for DMSO).
b
Concentration at 10 μM.
c
Concentration at 5.0 μM and excited in the first Q band.
d
Using TPP in DMF solution as standard (Φf = 11%).
e
SS = Stokes shifts (Q bands): Δλ = 1/λabs − 1/λem (cm−1).
f
Excited by nanoLED source at 441 nm.
g
Radiative and non-radiative rate constants.
h
Radiative lifetimes.